public class test {
    public static void main(String[] args) {
        LinkList list=new LinkList();
        list.addLast(15);
        list.addLast(26);
        list.addLast(33);
        list.display();
        System.out.println();
        list.addIndex(1,55);
        list.display();
        list.remove(26
        );
        System.out.println();
        list.display();
        list.addFirst(15);
        list.addFirst(25);
        list.addLast(15);
        list.addFirst(15);
        list.addLast(15);
        System.out.println();
        list.display();
        System.out.println();
        list.removeAllKey(15);
        list.display();
    }
}
